It honestly might have a lot to do with the Russos and Feige being on the same page throughout development too. It seems that their visions aligned that I think production ran smoothly, they edited as they shot, and it seems that post-production rolled right along to make the final cut something fairly close to the rough cut with a little trimming here and there.

Yeah, at this point, I wouldn't be surprised if the Russos were being groomed to succeed Whedon.

I skimmed the description of the 10 minute footage. I can say if it holds accurate, the humor seems to be very natural to the characters. Sam is really charming. (I think this is the page of the script that leaked last year.)

I suggested this in the Avengers forum and got a bombardment of negativity and doubt. It really seems like this may be the case though. The info in that link referred to the quality of the soundtrack as well. I can't wait to hear it.

__________________"When you come at the King you best not miss"- Omar Little